基于 SSD的 MC－TDMA系统抗衰落技术

摘要

To face the challenge to the stability and reliability of the future wireless networks brought with fading effect, a Multicarrier Time Division Multiple Access based on technology of Signal Space Diversity was proposed . The System takes advantage of the natural characteristic of the MDFT filter bank , and excavates the internal inher-ent modulation diversity gain of MC-TDMA.Theoretical analysis and simulation results show that SSD-MC-TDMA not only has better performance of fighting channel fading compared with MC-TDMA, but also keep its superiority on PAPR .%为了应对衰落效应对未来无线网稳定性和可靠性的巨大挑战，提出一种应用信号空间分集（ signal space diversity ， SSD）的多载波时分多址（ multicarrier time division multiple access ，MC－TDMA）系统。该系统利用MDFT滤波器组的天然特性，挖掘了MC－TDMA系统内部固有的调制分集增益。理论分析及各环境的仿真表明，SSD－MC－TDMA系统相比经典的MC－TDMA系统不仅具有更强的抗多径衰落能力，而且不会改变其优越的低峰均比（ peak to average power ratio ，PAPR）性能。